Update: I want to programatically simulate the key press event similar to user actually pressing a key on a virtual keyboard or external keyboard(for ipad). This will automatically invoke the UITextFieldDelegate method shouldChangeCharactersIn(_:range:replacementString:) and the pressesBegan(_:with:) methods, and take care of the textfield value updation. Note : In MacOS we can create custom NSEvents and post them to NSApp, allowing us to simulate mouse, keypress, gesture interactions. I wanted to understand If there is something similar frame available for iOS simulation?

@DTS Engineer, Is there some preference order in which we should use these ways to handle events? Say I want to handle a simple button click event where the user presses the button in UI using a single touch/tap. what should I use in this case? using addTarget() way to handle the .touchUpInside UIControl event. using UITapGestureRecognizer(with numberOfTapsRequired = 1 & numberOfTouchesRequired = 1) or using the custom touch handlers overriding touchesBegan, touchesMoved,touchesEnded Is there some recommendation like If all these options does the work then I should prefer one over the other. Or it does not matter we can use any ?

I’m building a complex application with a rich UI, and I need to handle granular events at multiple levels — UIControl events, UIGestureRecognizer events, and even subclass-level events depending on the use case. For UIControl, I often need to respond to granular events such as .touchUpInside, .touchDown, .touchCancel, etc., which are not fully covered by .primaryActionTriggered. From my understanding, .primaryActionTriggered does not actually reduce the number of addTarget(_:action:for:) calls I need to write — it only simplifies the choice of which event constant to use for a control’s primary action. So in practice, if my use case requires handling these diverse low-level events, I would still need to explicitly register for each event on each control. Is this the correct understanding?

@DTS Engineer , Thank you for the earlier response. I understand that Apple’s position is that one cannot programmatically generate a real keystroke event that passes through the OS’s full event pipeline (pressesBegan, etc.). However, based on my experiments, I observe that: * OverridinginsertText(_:) / deleteBackward()allow's interception of typed input and the possibility of deciding whether or not to call super so that the text in the text view actually updates. Calling insertText() programmatically results in the same updating behavior as user typing (for display, selection, etc.) Given these capabilities, could you clarify: Is using insertText(_:) / deleteBackward() in a subclass considered an “allowed” way to simulate user text input, for production code (outside of testing)? Or is it officially unsupported / fragile behavior (i.e. subject to change)? Even though we can’t generate a “real” key press event, since calling insertText(_:) does trigger the same downstream behaviors (delegate calls, text updates, cursor management), is this considered a supported and intended way to simulate user typing in production? Or is it just an internal side-effect that Apple does not want us to rely on?